Offline Pdf Merger In Browser Secure Merge
A fully offline, client-side PDF merging tool that runs directly inside your browser without any server, backend, or installation. This tool allows you to upload multiple PDF files, merge them, preview each PDF, exclude pages, and finally download the final merged PDF — all from a single HTML file.
Works inside any modern browser (Chrome, Edge, Firefox, Brave) - No internet needed - No data leaves your computer - Ideal for sensitive or private documents - Supports drag & drop or file picker - Accepts multiple PDFs - Shows file list with page counts - Preview each uploaded PDF - Right-side preview panel updates instantly - Page-by-page navigation - Smooth rendering - Select specific pages to remove - Bulk page exclusion options (e.g., odd/even pages) - Live preview reflecting changes - Combines all PDFs in the selected order - Preserves layout, fonts, images - Outputs a clean, optimized merged PDF - Exports with timestamp naming pattern: PDFMerger_YYYYMMDD_HHMMSS.pdf - Entire merging process handled in-browser - Two‑panel layout (left controls, right preview) - Smooth cards, shadows, gradients - Clear typography for readability - Mobile-friendly layout (optimized for desktop usage) The tool is packaged as a single standalone HTML file containing: - UI layout (HTML) - Modern styling (CSS) - PDF parsing/merging logic (JavaScript) - PDF.js + PDF-LIB libraries (either CDN or embedded for full offline mode) Simply double-click the.html file to open it in your browser.
No installation required. - Drag PDF files into the drop zone - Or click to browse - Files appear in a sortable list - Select any uploaded PDF to preview it on the right - Navigate pages using next/previous controls You can choose: - Individual pages - A range of pages - All odd pages - All even pages Click Merge & Download PDF to export the final file.
The tool automatically names the file with: PDFMerger_YYYYMMDD_HHMMSS.pdf The tool may use external CDN links like: To convert it to a single complete offline file: - Download the library files ( pdf.js,pdf.worker.js,pdf-lib.min.js ). - Replace the CDN script tags with: - Save the HTML. Now the tool works offline anywhere, even without internet. - HTML5 (UI layout) - CSS3 (styling and responsive design) - Vanilla JavaScript (main logic) - PDF.js (PDF rendering/preview) - PDF-LIB (PDF merging + manipulation) No frameworks. No backend.
Fully tested on: - Google Chrome - Microsoft Edge - Mozilla Firefox - Brave Browser (Internet Explorer is not supported.) Free to use, modify, and distribute. Created exclusively for Sudip Bayen. If you want enhanced features such as: - Drag-to-reorder PDF pages - Compress PDF before download - Watermarking options - Dark mode UI - Split PDF tool Just let me know — I can add them!
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